# Getting To Know The Circles

Do you know the names of the parts of a circle? Let’s verify your knowledge 🙂

**Circumference** of a circle is its distance around the circle. It is also the perimeter of the circle.

**Centre** is in the centre of a circle. The distance from this point to any other point on the circumference is the same.

The distance from the centre to any point on the circumference is called the **radius**.

A **chord** is a straight line joining two points on the circumference.

**Diameter** is longest chord in a circle, passes through the centre of the circle and joins two points on the circumference.

Part of a circumference of a circle is known as an arc. The shorter one is called the **minor arc** while the longer arc is called the **major arc**.

A segment of a circle is the region enclosed by an arc and a chord of the circle. The larger segment is called the **major segment** while the smaller one is the **minor segment**.

A sector is a region enclosed by two radii and an arc. The smaller sector is called the **minor sector** while the larger one is called a **major sector**.

The line is called a **tangent** if that straight line and a circle have only one point of contact. A tangent is always perpendicular to the radius drawn to the point of contact.

A **secant **is a straight line cutting at two distinct points on the circumference of the circle.

Well, is everything verified? 🙂

Posted on June 26, 2009, in Info Matematik. Bookmark the permalink. Leave a comment.

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